Stinging?

[tygerlilli.livejournal.com]

Hello, first time poster. I've scoured the faq's but still am a bit confused.

History bits:
I'm a virgin and don't like putting things in myself. I used to try (about two years ago) experimenting with narrow vibes coated with lube/lotion. Everything seemed fine then.
I have a yeast infection of sorts now (due to constant cephilexin use) and am taking an acidophilus along with applying tea tree oil to the area.

Problem:
I let my boyfriend put a finger inside me, but first I made him coat it with lube. Everything seemed ok at first, it hurt some but I thought it was due to the intrusion. But then it started stinging like mad and I ended up running to the bathroom to wash it off. I thought nothing of it.
Just yesterday I was experimenting for the first time since then and had a lubricated condom over a vibe with lotion on it. Same stinging problem. But it only affects my vagina, no other parts.

Question:
Why is the stinging happening? I did not have this problem in the past.


Edit: Ok, no more lotion. Check. Secondly, I am already taking steps to cure the yi. Thank you for your advice. I would like to know about the stinging, not the yi. Thank you though.